Note: Do not attempt to rescue or care for a native animal unless you have undergone training and hold the appropriate permit or license for your State. Please contact your local wildlife rescue group or a qualified vet for assistance. Marsupials and monotremes are unique, in that they are born extremely undeveloped and reside in the mother’s pouch during early development. To cater for these changing needs, the composition of marsupial milk changes significantly as the offspring grows. Wombaroo formulas reflect these changes by producing staged milk replacers for different ages of kangaroos, possums, wombats, koalas and echidnas.